Variable-speed gearing.



G. GHEDRU. 'VARIABLE SYBBD GRAB-ING. nrmoumn num JULY 1e, 1907.

Patented fp-.L l5, 1909. I SEHEN-SHEET 1.

G. cHDU.

VARIABLE SPEED GEABING. xrnonxox Hun IULM, non

Paten'd'June 15,1909.

I SHEETS-'SHEET 2.

@JMMj 4 e. GHDRU.

,VARIABLE SPEED GEABIHG. APPLIUAHON FILED JULY 1B, 1901.

924,889. Patented June15,19o9.

I SHEETS-SHEET 3.

Unwin) STATES Pivrin fr OFFICE.

GlS'l'AVl CHIDRU, 0l lll'l"l".\l,(), NEW YORK, ASSlGNOR TO E. R. THOMASMOTOR.

Ol' lil'l-'thtL NEW '.i'tlllx', A CORPORATION OF NEW YOBY.

COMPANY,

VARIAB LE SPEED GEARING.

Specification o1 Letters Patent.

Patented June 15, 1909.

Application led July 16, 1907. Serial No. 384,010.

'lb u/l ir/nmi if muy roncrrii:

lie it kann-n that I tli'srivr. Ciii'zniii, a 'itizen otl Fraine.residing at llntlalo, in the runnty nl' Ii'ie and State of en' York,have inventel a new and nsifu! Improvement in VarialilwSpeed (irai-ing,of n'hic'h the following is a specification,

This invention relates to a variable speed gearing whit-h morepnrtieularl)1 designed for use. in automobiles hut the saine may also heused for other pui' rises in which variation and rhange ni" rirertinn ofspeed or motion are reflnired.

'l`he object of this invention is the pri)` dnrtinn et' a simple.compact. :ind etlit-ient speed Changingr gearingY in which :ill of themotions from the driving shaft to the driven shaft are transmitteddirectly, therehy redin-iner the numliei of iai'ts through whiizh the,pmver is carried and minimizing the toss of prin-er, the wear of partsand the iinisr: aei'nrdingly.

In the accompanying drawings consisting of Il shees: Figure 1 is alongitudinal seetinn ot ir. iniproved variable speed gearing. Fig. afragmentary transverx` seeiion of the saine, on an enlarted seale, takeninline 2-2. Fig. 1. Figs. Il and 4 are transverse sections` on anenlarged seale, taken in line 3 4, Fig. 1, and viewing the parts inopposite directions, respectively. Figs. 5 an( 6 are transversesections, on fin enla rged scale, taken in line 5 6, Fig.' l, andviewing the parts in o )posito directions respectively. Vig. 7 is :idiagrammatic View, on a reduced scale, .showing a modified constructionof my invention.

Similar letters of rt'rference indicate correL spending parts throughoutthe several views.

represents the driving shaft or member and B the driven shaft. or memberwhich is arranged at right angles to the driving shaft, .ind extendsacross the rear end of the latter.

C represents the casing or housing which incluses the variable speedgearing interposed between the d ri' ving and driven shafts. 'lhiseasing is preferably divided in line with the eenter of the driving,rand driven shafts so as to permit of applying:r the casing tu the speedgearing or removing the same therefrom without. disiiiembering theentire gearing. One side of this casing is provided with a hearing 1' of:in v appmved construction in whieh the driving shaft is )mirnaledbetween its front and rear ends At its inner end the driving shaftisjoiirnale'd in n bearing il arranged on a cross piece D which is securedtn the inner .side of the casing. The driven shaft is journaled on theinterior 0f the easingnr by meansof the two sections E, E nf asupporting collar and a. hall beari Y e interposed between the outerside of said .supporting collar and the inner side of the easing. The,siipportingeolhir is preferably divided diametrieally and its parts areheld in aliiieinent by means of dowel pins e pass# in; r transverselythrough coinciding o nings in the sections thereof on op osite Sides ofthe driien shaft, as shown in gig. 2. In its here this supporting cellaris provided with longitudinal ribs f which engiiefe between similarlnngitudinal ribs f1 on t e periphery of the driven shaft, thus oieratinas a key Connection between the Cellar an driven sliai't which compelsthese parte to tnrn tngjethei.

(l represents a small bevel pinion iir-l` ranged on the front part'. ofthe' drivin shaft iviihinthe Gesine'. il a large beveled pininn arrangedon the rea: part of the drivingl shaft within the casing, and anintermediate hevel pinion arranged on 'the driving shaft hetweenthesmall front inimi and the large'rear pinion thereon. his set ofditlerent sized pinions may he formed either integrally' withl thedriving shaft or made separate therefrem and secured thereto hy keysiiiotherwise so as to tnrn with th:-

driving shaft and form the driving pinions of the speed gearing.

J, K and 1'.- represent a 'set of different sized forwardly turning gearwheels arranged eoncentrically about the driven shaft on one side of thedriving shaft and meshing with one side et the set of inions. The la rgegear wheel .l is journaled) on a bearing j formed on the driven shaftand meshes with the small pinion G, the intermediate gear wheel K isarranged adjacent to the inner side of the large. ear wheel J and mesheswith the intermeA inte pinion I tmd the small gear wheel L is arrangedonthe' inner side of the intermediate .er wheel and meshes with thelarge pinion H', 'as shown in Fig. 1.`

M represents :i reversing gaar wheel Journaled on a bearing m formed onthe periphery of the simnertingcollar and meshing' with the oppositeside of one of the pinions, )referably the small pinion (l, as shown ini' represents an inner clutch sleeve which is mounted en the drivenshaft so as to he capable of sliding lengthwise thereon but compelled toturn therewith. This is preferably etl'ected by providing the bore ofthissleeve with one or more longitudinal ribs Vn which fit between theribs f of the driven Shaft, as shown in Figs. 2, 5 and t5, and thus forma spline or feather connection between these parts. At one of its endsthe inner clutch sleeve is provided with a cylindrical bearing o onwhich the intermediate gear wheel K is journaled. The opposite end ofthis sleeve is provided with a shifting collar 01.

P represents an outer clutch sleeve which is mounted on the inner clutchsleeve and rovided in its bore. with a plurality of Ongitudinal ribs pwhich cooperate with similar ribs p on t ie periphery ot the innerclutch sleeve for producing a spline or feather connection between thesesleeves, whereby they are permitted to slide length` wise. onerelatively to the other but art` compelled to turn with the drivenshaft. .\t one end the outer clutch. sleeve is provided with. acylindrical bearing g on which the small gear wheel L is jonrnaled andat its opposite end this sleeve provided with a shiftingcollar g1. Theinner clutch sleeve is provided on its periphery adjacent to its bearingwith an annular row of clutch teeth R which project outwardly betweenthe hubs of the large and intern'iediate gear wheels. These hubs areprovided on opp/osite sides of the teeth .of the inner clutch .sleevewith annular rows of clutch teeth r, y", respectively. When the innerclutch sleeve is. in its central position, indicated in 'Fig l, itsclutch teeth are arranged midway between the hubs of the large andinterniediate gear wheels in which position neither of these wheels iscoupled with the driven shaft. Upon shifting the inner clutch sleevetoward the left of the central position, its teeth will engage withthose of the large gear wheel, there 1y coupling the latter with thedriven shaft and causing the power to be transmitted at slow speeddirectly from the driving shaft to the driven shaft by means of t'nesmall pinion, large gear wheel and innv j clutch sleeve. lpon moving theinner clutch sleeve toward the right of its central position, its clutchteeth will be inter-locked with 'these of the intermediate gear wheel,thereby causing the. movement of the driving shaft to be transmitted atintermediate speed directly to the driven shaft by the intermediatepinion, intermediate gear wheel and inner clutch sleeve.

On the central part of the outer clutch sleeve the same is provided withan annular row of clutch teeth s and the hubs of the small gea r wheell, and reversing gear wheel .\l are. provided with clutch teeth l, m onopposite sides of the teeth on the ontert'lutch teeth. When the latteris in the central position, its teeth are arranged midway between thoseot' the small forward turning gear wheel Land the rerersing gear wheel.\l, as shown in Fig. 1. Upon shifting the outer clutch sleeve towardthe left, its clutch teeth will engage those of the small forwardturning gear wheel L and thereby transmit motion from the driving shaftat high speed directly to the driven shaft by meansof the large pinionIl, small gear wheel L, outer clutch sleeve l and inner clutch sleeve N.Upon moving the outer clutch sleeve 'award the right, its clutch teethengage v. h the clutch teeth of the reversing gea -'l1eel,

thereby causing the motion of the driving shaft to be transmitteddirectly te the driven shaft. at slow speed and in a reversed directionby means of the small pinion G, the reversing gear wheel M, outer clutchsleeve l and inner clutch sleeve N.

lt will be noted that this change speed gearing renders it possible totransmitthe various speeds forward and backward directly from thedriving shaft to the driven shaft; thereby avoiding carrying the powerthrough idle gearing and reducing the wear, loss of power and noisewhich usually occurs in speed gearings which etici-.t indirecttransmission of power from the driving shafts.

The movement of the forward turning gear wheels toward the right islimited by the engagement of these wht-els with their respective pinionsbut the movement of these wheels. toward the left and the properseparation of the same. is cll'ected by means of three thrust bearingst, l, t one of which is arranged between the hubs of the small andintermediate gear wheels, another between the. hubs of the intermediateand large gear wheels and another between the hub of the large gearwheel and a shoulder or abutment the hubs of the intermediate and largegear wheel M is held against movement toward the left b v engagementwith the low speed pinion (l but its motion toward the right is imitedby engagement of its hub with a shoulder u formed on the supporting'collar. When the clutch teethv of the inner sleeve are disengaged fromthe teeth of the large and interimzdiate speed wheels and the teeth ofthe outer clutch sleeve are disengaged from the teeth of the small andreversing gear wheels, as shown in Fig. l, the driving .shaft rotatesidly and no movement is trailsmitted from the. same to the driven shaft.'lhe .shifting of the sleeves may be effected by a controlling mechanismof any approved construction which is connected with the collars o* andq* of said sleeves. This con trolling mechanism of the speed changinglill) "'.L'WH wheels meshin; r pn-ions. a reversing gearing;r :shouldhe. 0 constructed that il is mpossihle to engage the elntcli teeth ofthe ylnteh sleeves with more than one gear wheel it a time, lherelrvpreventingy lilot'lt'ing of the fearing and possihlt: injury to thesaine. 'l`he 5 nner and outer elnttli sleeves extend toward i he rightlit-.vond tht` supporting collar l, l) where the controlling mech-.mismma he uore readilv attached thereto hut the supporting eollar ismoin-.ted tlirettlv on the. lriven shaft. 'l`o permit of this. thesupporting eollar 1".. lis provided in its here with a pluralit)` ofreve-se.i r fortuin;r hear i\'t portions or lug` l." in th` litn'e ol'the rollar whieh engage with the periplierj.'l ot i the driven shalt andthtinner and outer; t-lutt-h sleevesare provided willi eoitititlitig llongitudinal .slots tr. tr" through whit-li the lugs of the supporting"ollar projet-t and leaving longitudinal hars or solid portions te, lwon said sleeves whith extend through l the recesses l' in the liore ofthe supporting i-ollar. B t' this int-ans the inelosiugl4 easing*r andthe driven shaftl engage direetli' willi t eat'h other. ther-shi'relie-:ing the elutt-h sleeve.s from pressure of these partis7 wherehiYthese sleeves ma v he shilted readiljtl and' tasilv for olilaining;l thevarious t'hang'es in the i'ate and diret-tion ot` motion` I .lt desired.this speed rhanging gearingi may he so organized that the motion istransinitted h v the same ie\'ersel from that just l deserihed. Sueh areversal is shown in Fie'. i in which represents the, driving;l shat'tulll the driven slia'l't. (i1. ll'. l the high speed, loa' speed andintermediate speed pii ions. respeetiveli'. on the driven shaft. .l. ti.L the high speed. intermediatel speed and l low speed gear wheelsmeshing willi the eoil responding pinions on ont: side thereof and l\l1the revers-in;r gear wheel meshing with l the low speed pinionll. I lclaim as in v invention: l. variahle speed gearingr comprising! twoshafts, a plurality of tlitl'erent .sr/.ed pinions arranged on one ifsaid shafts. a. plurality of dill'erent sized forward turning with oneside nl said gear wheel meshiu;r ith the oppo ite sidtof one of saidpinitns` a slidin'g'sleeve turningr with the other .shaft and providedwith elntrli teeth which are adapted to engage with elnteh teeth on theopposite sidesA nl' two of the. forwardly turniuLY gear wheels. and asliding slt-eve also tnruig with :titl last mentioned shaft antlhavin'e4 eluleh tet-th adapted to engage. with eiuteh teeth on theopposing Sides of another one of saitl torwardliY tui-niner gearwhet-.ls and said r1" ersing gear wheel, sul)- .stantialiy as set.forth.

'2. A variable gearingr comprising tivo shafts, a plurality of diterentSized pinions arranged on one of said shafts., a

plurality of di'erent sized forward turning gear wheels meshing with oneside of said j piuions, a reversing gear wheel meshing with the opposite.side ot' one of said pnnons, an

inner eluteli sleeve splined on the other shaft and havin r elutrh teethwhich are adapted to engage with elntt-h teeth on the opposing .Jules ottwo ot' said'forwardly turning veal' wheels. and an outer t-lutelisleeve splint-1 on the inner elnt'eli sleeve and having clutch teethadapted tu engage with eluteh teeth on thtl opposing: side`l of anothllof said forward turningA gear wheels and said reversing gear wheel.salisiantiallw as ser l'orth.

El. variahle speed gearing eotnprisiner two shafts arranged at an angleto eat'i other. a plurality ot dill'erent sized pinions ue-thing withone side of said pinions. a for- \':.n-dl v turning git-ar wheel meshingwith one ot' said pinions and journaled on the other sha lit. anotherforwardly turning gear wheel meshing; with another o ae of said pinions.:unl a sleeve splined on the last mentioned `haft and ha ving a hearingon whieh the last mentioned ,I "ear wheel is jotu'nalethvthe oppo in`15sides ol said geauwheels having flnteh teeth and said .sleeve havingrteeth adapted to mesh willi the teeth otl said gear wheels:1-'uhstantiallv as set torth.

-l. variahle .speed gearing eomprisilw two shafts arranged at an angleto eact other. a set ol' z-'inall interliiediate and large pinionsarranged on one of said shafts, a setl ol' large. intermediate and small`:rear wheels meshing respeetivelv willi said pinions and eath providedwith tlntth teeth. n hearing au the other `ha'l't tor said large gearwheel, rn inner -sleeve turningr with the lastumerb tioned shat't andhaving a heat-iinr or the intermediate gear wheel, antl provided withelntt-h tet-lli adapted to engage with teeth on the large andintermediate gear wheels, and

' an outer sleeve. turning' with the. last mentioned shaft and having ahearing:l on which sant sinall gear wheels are Journaled, and providedwith elnteh teeth adapted to engage with the teeth on said small `,'earwheel,

sttllstanliallv :is Set forth.

variahle speed gearing!"t-oniprisingr two shafts. a pluraliti ofditl'erent sized pinious` arranged on one of said shafts. a plurality ofdifferent, sized forward tnrningrr {ear wheels meshing with one side ofsaid pinions` a reversing gear wheel meshing with the opposite Slide ofone of Said pilliOnS. an inner eluteh sleeve s )lined on the other shaft.nal having rlutthi teeth which are adapted to engage with elntelt teethon the opposingr side of twoofsaid forivartllytnrning `fea r wheels. anouter eluteh sleeve splined on the inner elutt-h sletwe and having,relnteh teeth adapted to engage with eluteh teeth O'i the. opposing sidesol' :mother of said forward turning gear wheels and said reversing gearwheel. and thrustl bearings interposed between adjaeent forward turtinggeur lll( ' casing for the speed wheels and between one'of said forwardturning gear wheels and an abutment or shoulder on the shaft thereof,substantially as set forth.

(t. A variable speed gearing comprising two shafts, a plurality ofdiiferent si'l. pinions mounted on one of said shafts, a plurality ofdifferent sized gear wheels meshing with said pinians,'a sliding clutchsleeve turnin f with the other shaft and provided with ongit-udinalslot-s, and with clutch teeth and adapted to engage with clutch teeth onadjacent. gear wheels, an iuelosing' casing for the speed gearing` and asupport-ing collar journaled un the casing and having lugs in its borewhich project through the slots of said sleeve into engagement with theshaft therein, substantially as .Cet forth.

7. A variablespeed gearing!I comprising two shafts, a plurality ofdifferent sized inions mounted on one of said shafts, a plurality ofdifferent sized gear 'wheels meshing with said pinions, a sliding clutchsleeve turning with the other shaft and provided with longitudinalslots, and having clutch teeth adapted to engage with clutch teeth onadjacent gear wheels, an inelosing gearing, a divided supporting collarhaving its sections embracing said sleeve and journaled in a bearing'onsaid casing, and dowels arranged on said -:eetions on opposite sides ofthe sleeve, said cull-.ir having lugs projecting from its bore throughthe slots in the sleeve inte engagement with the shaft therein,substantially as set forth.

8. A variable speed gearingcomprising twu shafts' arranged at au angletu each other, a set of small, intermediate and large pinions arrangedon onel of said shafts, a set of fnrwai-d turning large intermediate andSmall gea-r wheels meshing with one side. of said pininns, respectively,a reversing gear wheel meshing'with the opposite side uf one of saidiinions, a bearing ou the other shaft for said large gear wheel, aninner slidinv sleeve turningr with the last mentinned-shat't andprovided with slots and with a bearing for diate rear wheel, and withclutch teeth adapte'to engage with clutch large and intermediate gearwheels, an outer cluteh sleeve turning with the last mentioned shaft andprovided with a hearing for the small gear wheel and with lungi#Atudinal slots which register with those ttf"I A the inner sleete, andwith clutch teeth ada )ted to engage with eluteh teeth'oirsaid, sma lgear wheel and said reversing gear wheel, and a supporting sellarsurrounding the outer sleeve and having a bearing for said reversinggear wheel, and having lugs projecting from its bore through the/slotsuf said sleeves into engagement with the shaft within the inner sleeve,substantially Aas Seti forth.

lVitnes-s my hand this 15th day of July, 1907.

l GUSTAVE CHDRU. vlVitnesses:

Jeux Kauen'rx, E. R. Tinian-xs.

longitudinal ld interme-v t'eeth on the

